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get_nmfields
Langue: en
Version: 8 December 2008 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
get_nmfields --- report the number of metafields in a dirfileSYNOPSIS
#include <getdata.h>- unsigned int get_nmfields(DIRFILE *dirfile, const char *parent);
DESCRIPTION
- The get_nmfields() function queries a dirfile(5) database specified by dirfile and returns the number of metafields defined in the database for the parent field specified by parent.
The dirfile argument must point to a valid DIRFILE object previously created by a call to dirfile_open(3).
RETURN VALUE
Upon successful completion, get_nmfields() returns the number of defined metafields for the given parent. On error, it returns zero and sets the dirfile error to a non-zero error value. Possible error values are:- GD_E_BAD_CODE
- The supplied parent field code was not found, or referred to a metafield itself.
- GD_E_BAD_DIRFILE
- The supplied dirfile was invalid. The dirfile error may be retrieved by calling get_error(3). A descriptive error string for the last error encountered can be obtained from a call to get_error_string(3).
SEE ALSO
dirfile(5), dirfile_open(3), get_error(3), get_error_string(3), get_mfield_list(3), get_nfields(3), get_nmfields_by_type(3), get_nmvectors(3)Contenus ©2006-2024 Benjamin Poulain
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